I have had teh misfortune to have dealt with a Phelps type from here in mid-Ohio once in the past. Professionally. I was participating in the prosecution of a child molestor, a male molesting young boys. Turns out he was also a volunteer at Big Brothers/Big Sisters. Nasty case.
Anyways, God's little worker bee caught me outside the courthouse with half a dozen of his follower bees, and television and newspaper reporters. tried to thank me for doing God's work to get rid of teh "fags who want to take our children." What did I do? Turned and walked away, leaving him standing there with his hand out. Local reporter asked me about it, and I ignored the question.
Ignore people like this, and they go away. It's all about the attention.